Bike Electronic Bell 100% brand new and high quality. A Bell to draw people's attention on street. Keep your kid from danger by warning or noticing others. The Bicycle Bell is easy to be fixed on the bicycle. Powered by 2 AAA batteries(Not Included). Fixed on the bicycle diameter: 20-26 mm. Size: 4.5cm x 5cm x 6.8cm.(LxWxH) Sound emitted: approx. 90dB. Color: Red